Moisture impervious absorbent sheet for covering work surfaces in chemical laboratories and the like



Oct. 6, 1953 A. HEIKIN 2,654,684 MOISTURE IMPERVIOUS ABSORBENT SHEET FOR COVERING WORK SURFACES IN CHEMICAL LABORATORIES AND THE LIKE; Filed Oct. 7. 194a INVENTOR. ABRAHAM HElK/N ATTORNEY Patented Oct. 6, 1953 I UNITED STATES PATENT OFFICE MOISTURE IMPERVIOUS ABSORBEN T SHEET FOR COVERING WORK SURFACES IN CHEMICAL LABORATORIES AND THE LIKE Abraham Heikin, Philadelphia, Pa. Application October 7, 1948, Serial No. 53,324 4 Claims. (01. 154-43) (Granted under Title 35, U. S. Code (1952),

sec. 266) 2 The invention described herein may be manuwork surface, and the protective sheet of the factured and used by or for the Government of present invention constitutes temporary covering the United States of America for governmental that is readily replaceable.

purposes without the payment of any royalties For a more comprehensive understanding of thereon or therefor. 5 the principles of the invention, and for disclosure The present invention pertains to the art of of one practical structure thereof, attention is The invention comprises a laminated sheet, In the drawing, H represents a piece of furniembodying an exposed lamina or layer of highly ture embodying a work surface l2. The lamiexposed layer of blotting paper, a backing layer pervious lamina or layer l5, which may be lead blotting paper and a coating of pressure-responfoil, is positioned to back the blotting paper I4 and sive adhesive on the surface of the sheet oppois bonded thereto, for example by means ofa layer site the exposed surface of blotting paper I6 of permanent cement formed of a conventional In the use of furniture in chemical laboracomposition that can be appliedinliquid or paste tories, damage is frequently caused to the furniform and is set to form a permanent bond The ure by contact with liquid chemicals spilled exposed surface of impervious lay that 15,

that are not chemically active in contact with sensitive adhesive I! of any suitable convention of the furniture surface by acid treatment 2,335,319 discloses a Suitable p ess r app y in case of stainless steel furniture, or by discardpressure-responsive adhesive a a nat ing and replacing the furniture in the case of sheet or strip, which may be S m lar y p y it containing such materials as Transite or in th p a f the p nt ti n.

Laminated sheet embodying th present 40 surface 12 to be protected, with the pressure-revention is positioned on the work surface of a SDOIISiVB Cement IT in Contact With ce and is adhered th t by means of th coating spilled upon the laminated sheet 13 is absorbed of pressure-sensitive adhesive. The furniture is by the blottin p p r I nd is th r y p protected thereby from being damaged or devented from flowing and pouring over the edge stroyed by chemicals that are spilled. spilled of furniture H. The metal backing I 5 prevents liquid is absorbed by the blotting paper which penetration of the liquid through sheet [3 to the constitutes the exposed surface of the protective urface [2,

covering, and is thereby prevented from flowing For chemical laboratory work involving use of and pouring over the edge of the work surface. radioactive materials, it

l king l5 for the blotting the blotting paper prevents the liquid from penepaper It! 18 metal lead which is impervious to trating through to the work surface When a radioactive substances. protective sheet becomes soiled, it is easily re- A soiled sheet l3 may be removed from the movable to be discarded by stripping it from the furniture H and discarded by stripping the sheet to the specific:- structure thataisashown and: dc:- 6

scribed I claim:

1. In a laminated sheet, a lamina of blotting? paper forming one face of thelsheetr adam-inamf;

metal foil backing the blotting paperandzbonded: 10'

thereto, a coating of pressureesensitive.:adhesivea on the face of the laminated sheetu thatissoppoesite the blotting paper. 7

2. In a laminated sheet as defined in claim l'; the metal foil constituting lead foil.

3. In a laminated sheet as defined, in.-claim T1,, the metal foil constituting aluminum foil.

4. In combination, a piece of furniture comprising a work surfaceand a protective sheet he for;lf ha mtectiveisheet comprisingalamina 20 234287385 o .;b l otting-=.papliliormingironeaface of the she et; a

lamina of metal foil backing the blotting paper and bonded thereto, a coating of pressure-responsive adhesive on the face of the protective sheet that is opposite the blotting paper, the protective sheet'being adhered to th'esworl surface of the furnitureb'y means of thepressure-responsive adhesive.

ABRAHAM HElIiIN.

Refleil'ces'rGi'i'ieil v in the file Of this patent UNITED STATES PATENTS Number Name Date 609,222 Taylor Nov. 30, 1926 2201331 19 Warth Sept. 3, 1935 211323345 Hnmphner Mar. 3, 1936 2,068,975 Cofiman Jan. 26, 1937 2,226,589 Smyers Dec. 31, 1940 2,385,319 Eustis Sept. 18, 1945 Reynolds O'c't'; T, 1947 

4. IN COMBINATION, A PIECE OF FURNITURE COMPRISING A WORK SURFACE AND A PROTECTIVE SHEET THEREFOR, THE PROTECTIVE SHEET COMPRISING A LAMINA OF BLOTTING PAPER FORMING ONE FACE OF THE SHEET, A LAMINA OF METAL FOIL BACKING THE BLOTTING PAPER AND BONDED THERETO, A COATING OF PRESSURE-RESPONSIVE ADHESIVE ON THE FACE OF THE PROTECTIVE SHEET THAT IS OPPOSITE THE BLOTTING PAPER, THE PROTECTIVE 